American's unlike Italians, really do pay their taxes. But me being non American have no idea how the US taxmachine works except that it's a big complicated topic and nobody in Murica seems happy about it. While I am reading this I think this data is already worth sharing. 

 https://www.ntu.org/library/doclib/2020/12/2018-who-pays-1-.pdf

You got to look at this from bottom to top. 
You got to look at this from bottom to top.